State Key Laboratory of Fine Chemicals, School of Chemical Engineering, Dalian University of Technology, Dalian 116024, China; School of Chemistry and Materials Science, Liaoning Shihua University, Fushun 113001, China.
State Key Laboratory of Fine Chemicals, School of Chemical Engineering, Dalian University of Technology, Dalian 116024, China.
J Hazard Mater. 2016 Sep 5;315:76-85. doi: 10.1016/j.jhazmat.2016.03.092. Epub 2016 Mar 31.
A series of nanostructured pyrophosphates Zr1-xTixP2O7 (x=0, 0.2, 0.4, 0.5, 0.6, 0.8, and 1.0), have been prepared via a facile microwave induced route in which zirconium hydroxide, titanium hydroxide and phosphoric acid were used as Zr, Ti and P sources, respectively. It is demonstrated the isomorphous substitution of Zr(4+) by Ti(4+) results in a decrease of the size and an enhancement of the adsorption capacity of the obtained particles for U(VI) in aqueous solution. The maximum amount of TiP2O7 for U(VI) reached up to 309.8 mgg(-1) under the experimental conditions (pH=5, t=60min and T=303K). The as-obtained specific metal pyrophosphates exhibit a considerably higher adsorption capability for U(VI) in aqueous solution compared with Zr1-xTixP2O7 prepared by calcined method, showing a high potential for U(VI) sequestration applications. The adsorption kinetics and thermodynamic analysis of Zr1-xTixP2O7 on adsorption of U (VI) were performed, and a possible adsoprtion mechanism was also proposed.
一系列的纳米结构焦磷酸盐 Zr1-xTixP2O7（x=0、0.2、0.4、0.5、0.6、0.8 和 1.0），已经通过一种简单的微波诱导路线制备，其中使用了氢氧化锆、氢氧化钛和磷酸作为 Zr、Ti 和 P 的来源。实验证明了 Ti(4+)对 Zr(4+)的同晶取代导致获得的粒子的尺寸减小，并且在水溶液中对 U(VI)的吸附容量增强。在实验条件下（pH=5、t=60min 和 T=303K），TiP2O7 对 U(VI)的最大吸附量达到 309.8 mgg(-1)。与通过煅烧法制备的 Zr1-xTixP2O7 相比，所获得的特定金属焦磷酸盐在水溶液中对 U(VI)具有更高的吸附能力，显示出用于 U(VI)螯合应用的巨大潜力。对 Zr1-xTixP2O7 吸附 U(VI)的吸附动力学和热力学分析进行了研究，并提出了一种可能的吸附机制。
